Well, unless they're bringing in some three letter agency that has face recognition technology, I'm not thinking they'll be getting too many guys' info. I understand they could have had people in the ranks keeping an eye on things as well as the surrounding areas watching things, but from what I understand-a lot of people car pooled. So we'll see what happens.
The guy who was perched in the crappy sniper position between 2 K-rails with his AK... his picture posted all over the place.... his name and residence is well known since he gave that info to reporters.